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Do not set the Low Temperature Limit setting
above the High Temperature Limit setting.
For example if the High Temperature Limit
is set at 190
F with the High Temperature
0
!
Differential at 20
Limit needs to be set at 170
the settings are overlapped then the control
will not operate properly and the burner will
switch off at the lower setting.
Initial Service Checks
Before troubleshooting:
1.
A.
Make sure that circuit breaker is on or fuse is ok at
electrical panel.
B.
Make sure that service switch is on.
C.
Make sure that gas is on at the gas meter, and that
all appropriate manual shutoff valves and gas con-
trol valve are open.
D.
Make sure that the thermostat is calling for heat.
E.
Check that wire connectors at the Temperature
Limit Control and Transformer are securely plugged
in or connected.
Troubleshooting tools:
2.
A.
Voltmeter to check 120Vac and 24Vac.
B.
Continuity tester.
C.
U-tube manometer or differential pressure gauge
with 0-14" range (0.1" Scale) for measuring inlet
and manifold gas pressures.
What is the system status?
3.
A.
For troubleshooting information refer to Hydrolevel
Hydrostat Model 3100 ECR Temperature Limit Con-
trol Instructions.
Hydrolevel Model 3100 ECR Temperature Limit Control Instructions and Troubleshooting :
SEE HYDROLEVEL INSTRUCTIONS AND TROUBLESHOOTING GUIDE SUPPLIED IN LITERATURE PACKAGE
SEQUENCE OF OPERATION
CAUTION
F then the Low Temperature
0
F or lower. If
0
TROUBLESHOOTING
HYDROLEVEL HYDROSTAT MODEL 3100
RECEIVED WITH YOUR BOILER
Low Water Condition
If the water level in the boiler falls below the level of the
sensing well, the control will close the main gas valve
within three seconds, shutting off the main burners. The
RED LED will illuminate indication a low water condition.
Once the water level has been restored the RED LED will
go dark and the control will resume normal operation.
PWXL with Standing Pilot
Units with a standing pilot do not use an ignition module or
a separate pilot valve. Upon a call for heat the control will
open the main gas valve and the standing pilot will then
light the main burners.
28
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